To ejaculate. To have one's sperm shoot out of the penis after intercourse, typically onto a woman's stomach or back right after you pull out, for safety's sake. This does not occur during the act of making love, this is solely reserved for hot, passionate and animalistic urges for pleasure, not procreation.

So, I was fucking my girlfriend the other day and right before I finished, I had to pee the white stuff all over the place.